Timeline for MOSFET in place of potentiometer
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Oct 26, 2020 at 3:04 | review | First posts | |||
| Oct 31, 2020 at 12:41 | |||||
| Oct 17, 2020 at 14:04 | answer | added | Rohat Kılıç | timeline score: 1 | |
| Oct 17, 2020 at 13:26 | comment | added | user16324 | You'd be better off using a "digital potentiometer" controlled by the Arduino. | |
| Oct 17, 2020 at 13:23 | comment | added | Transistor | Right, that's different. Please edit to include a link to the datasheet you're using. You're using R1 as a variable resistor. You could probably use it as a potentiometer by eliminating R2 and R3, connect FLOAT to GND and the wiper to the regulator. The datasheet may give us a clue. | |
| Oct 17, 2020 at 13:17 | comment | added | Jacob | I changed it take a look | |
| Oct 17, 2020 at 13:16 | history | edited | Jacob | CC BY-SA 4.0 |
added 160 characters in body
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| Oct 17, 2020 at 13:09 | history | edited | Neil_UK | CC BY-SA 4.0 |
it's
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| Oct 17, 2020 at 12:56 | comment | added | Transistor | You need to show the circuit you are proposing to modify. You are suggesting using the MOSFET as a variable resistor. But a potentiometer is more than a variable resistor - it's a pair of variable resistors that add to a constant value. (As one goes up the other goes down.) Your schematic should show us the configuration and you should add notes to explain the maximum and minimum voltage (and whether it goes negative) in and what you are driving. Have you considered a digital potentiometer? Edit all the information into your question. | |
| Oct 17, 2020 at 12:44 | comment | added | Rohat Kılıç | A MOSFET can operate as a voltage-controlled resistor (VCR) but it's quite hard since the ohmic region of a MOSFET is very narrow and thus hard to tune. | |
| Oct 17, 2020 at 12:40 | history | asked | Jacob | CC BY-SA 4.0 |